In orthographic projection, which description is most accurate?

In orthographic projection, which description is most accurate?

• A. There are always at least 2 views.
• B. It could have as many as 8 views.
• C. One-view, two-view, and three-view drawings are the most common.
• D. Orthographic projection uses only isometric views.

Answer: (C)

Orthographic projection communicates an object's true size and shape by projecting features onto perpendicular planes, so each view shows a two‑dimensional representation of one face without perspective distortion. The most common practice is to provide front, top, and side views, which together reveal width, height, and depth and allow features to be aligned across views. A one‑view drawing can suffice for very simple shapes, and two views can cover more geometry, but three views are the standard starting point for a clear, unambiguous description of a part. Saying you could have up to eight views isn't a fixed rule; additional views (like sections or auxiliary views) are added as needed, but eight is not the norm for basic orthographic drawings. Isometric views are not part of orthographic projection—they're a different pictorial method that shows depth with angled, equally foreshortened axes, whereas orthographic uses perpendicular projection to the planes.

Orthographic projection communicates an object's true size and shape by projecting features onto perpendicular planes, so each view shows a two‑dimensional representation of one face without perspective distortion. The most common practice is to provide front, top, and side views, which together reveal width, height, and depth and allow features to be aligned across views. A one‑view drawing can suffice for very simple shapes, and two views can cover more geometry, but three views are the standard starting point for a clear, unambiguous description of a part. Saying you could have up to eight views isn't a fixed rule; additional views (like sections or auxiliary views) are added as needed, but eight is not the norm for basic orthographic drawings. Isometric views are not part of orthographic projection—they're a different pictorial method that shows depth with angled, equally foreshortened axes, whereas orthographic uses perpendicular projection to the planes.